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本文主要从冲击、振动和声振方面介绍H-Ⅱ运载火箭的研制情况.日本宇宙开发事业团一直在按照低成本和高可靠性原则研制日本国产的运载火箭。 H-Ⅱ运载火箭结构系统的设计和研制将达到按力学环境形成运载火箭的新方案所规定的目标。这种新方案能使H-Ⅱ运载火箭在振动冲击和声振方面达到高可靠性而研制费用低。达到这一结果的基本原则是规定H-Ⅱ的结构设计应把它的部件飞行力学环境限制在预计值之内。降低研制费用要求研制周期短和放松设计要求,缩短研制周期则要求同时研制运载火箭的部件和主要系统。为此,需要研制的箭上设备的设计要求必须在H-Ⅱ结构具体设计之前确定下来。H-Ⅱ结构设计和箭上设备安装设计要求达到的力学环境低于H-Ⅱ。H-Ⅱ已成为按力学环境设计形成的运载火箭。
In this paper, the development of H-II launch vehicle is mainly introduced from the aspects of impact, vibration and sound vibration, and JAXA has been developing the launch vehicle made in Japan according to the principle of low cost and high reliability. The design and development of the H-II launch vehicle structural system will achieve the goals set by the new scenario of launching rockets under the mechanical environment. This new scheme enables the H-II launch vehicle to achieve high reliability in terms of vibration impact and acoustic vibration with low development costs. The basic principle to achieve this result is to stipulate that the structural design of H-II should limit its component aeromechanical environment to the expected value. Reducing development costs requires a short development cycle and loosens design requirements, while a shorter development cycle requires the simultaneous development of components and main systems for launch vehicles. For this reason, the design requirements of the equipment to be developed on the arrow must be confirmed before the specific design of the H-Ⅱ structure. H-Ⅱ structural design and equipment installation on the arrow design requirements to achieve the mechanical environment is lower than the H-Ⅱ. H-Ⅱ has become a launch vehicle formed by the mechanical environment design.